:root{--bg:#fff;--surface:#fff;--border:#e5e7eb;--text:#111;--text-secondary:#6b7280;--primary:#6c5ce7;--primary-hover:#5a4bd1;--primary-light:rgba(108,92,231,.06);--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--radius:6px;--shadow:0 1px 2px rgba(0,0,0,.05);--shadow-lg:0 4px 12px rgba(0,0,0,.08)}*,:after,:before{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto}code,pre{font-family:SF Mono,Fira Code,Consolas,monospace;font-size:.9em}.container{max-width:900px;margin:0 auto;padding:0 20px}.header{border-bottom:1px solid 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